Stop device for apparatus for stagnation and automatic conveying of cloth



April 19, 1966 YosHlKAzu sANDo ET AL 3,246,820

STOP DEVICE FOR APPARATUS FOR STAGNATION AND AUTOMATIC CONVEYING OF CLOTH I NVENTORS YSH/KAZU 5A NDO KUN/HA RU NA SU BY /1 V05/ N4 KABA 7' TURA/Ey?.

April 19, 1966 YosHlKAzu sANDo ET Al. 3,246,820

STOP DEVICE FOR APPARATUS FOR STAGNATION AND AUTOMATIC CONVEYING OF CLOTH 6 Sheets-Sheet 2 Original Filed May l5. 1962 FIGA INVENTORS. yosH/KAzu sANoa KUN/H4120 NAsu By ff/Yas/ /vArrAaA ATTORNEYS.

Apnl 19, 1966 YosHlKAzu sANDo ET AL 3,246,820

STOP DEVICE FOR APPARATUS FOR STAGNATION AND AUTOMATIC CONVEYING OF CLOTH Original Filed May l5, 1962 6 Sheets-Sheet 5 A TTOQ/VEYS.

Aprll 19, 1966 YosHlKAzu sANDo ET AL 3,246,820

STOP DEVICE FOR APPARATUS FOR STAGNATION AND AUTOMATIC CONVEYING OF CLOTH Original Filed May 15, 1962 6 Sheets-Sheet 4 Vasi/H6420 .sA/voo Kun/HARU /vAsu BV K/yos/ NAKABA A TTRNE YS.

Aprll 19, 1966 YOSHlKAZU SAND@ ETAL 3,246,820

STOP DEVICE FOR APPARATUS FOR STAGNATION AND AUTOMATIC CONVEYING OF CLOTH Original Filed May 15, 1962 6 Sheets-Sheet 5 E IIII inw# I lll HIl l @Nm -2/,' d (.'2/ /faf "H607 l1 M* M" /9/1 O C fr /2I Nr ATTORA/EXS'.

April 19, 1966 YOSHlKAZU SAND@ ET Al.. 3,246,820

STOP DEVICE FOR APPARATUS FOR STAGNATION AND AUTOMATIC CONVEYING OF CLOTH Original Filed May l5, 1962 6 Sheets-Sheet 6 'fdd J INVENTORS.

YosH/fmzu sANaa KUN/HARU NAsu BY K/YOS/ NKAEA A TT ORNE 5 United States Patent O 3,246,820 STOP DEVICE FOR APPARATUS FOR STAGNA- TION AND AUTOMATIC CONVEYING F CLOTH Yoshikazu Sando, 2 Chayanocho, Wakayama-shi, Wakayama-ken, Japan; Kuniharu Nasu, 132 Minato, Wakayama-shi, Wakayama-ken, Japan; and Kiyosi Nakaba, 1278 Kimidera, Wakayama-shi, Wakayama-shen, Japan Original application May 15, 1962, Ser. No. 194,885, now Patent No.y 3,172,275, dated Mar. 9, 1965. Divided and this application July 23, 1964, Ser. No. 387,544 Claims priority, application Japan, May 20, 1961, :i6/18,041; Dec. 23, 1961, 36/47,010 Claims. (Cl. 226-119) This application is a divisional application of application Serial No. 194,885, now US. Patent 3,172,275.

This invention relates to an apparatus for continuously effecting various processings or treatments such as desizing, scouring, bleaching, dyeing, etc., of cloth.

One feature of the invention resides in introducing a cloth treated with liquid into a reaction tower where it is both steamed and boiled so -that the cloth can be processed uniformly. Advantageously, the cloth is processed without any spotting thereon by the treating liquid and the processing of the cloth is relatively low in cost. Another feature of the invention resides in that the cloth to be treated is continuously introduced into the reaction tower; the cloth being stagnated or kept in the tower for the required period of time necessary to complete each of the unit operations, such as desizing, scouring, bleaching, dyeing, etc.

According to another feature of the invention, when the cloth is stagnated and conveyed within the reaction tower, tension is not applied to the cloth and damage thereto due to friction and the like is reduced.

According to another feature of the invention, when the cloth has stagnated and descended within the reaction tower it may .be lead out of the reaction tower by being floated out of the tower on water, or the reaction liquid, which is kept in a bottom portion of the reaction tower.

One object, among others, of the invention is to provide an apparatus which will effect with high eiliciency in a short time the continuous processing of cloth by such unit operations as, for example, desizing, scouring, bleaching, dyeing, etc.

In general, when the operations of desizing, scouring, bleaching, dyeing, etc. are effected on a long size cloth, it is necessary to dip the cloth into a treating liquid and to keep the cloth in the gas, vapor or moisture generated from the liquid for a certain time period. If this processing is automatically and continuously effected, the greater the moving lspeed of cloth, the longer the treatment apparatus must be. Of course, this requires a-relatively greater capital expenditure.

According to another feature of the present invention, cloth receiving shelves are provided on a conveyor chain belt at regular intervals. The cloth being continuously fed into a reaction tower is piled on these shelves and is stagnated thereon. Then the cloth is caused to descend through the tower with the shelves automatically. This operation is repeated several times to stop or stagnate the cloth in the liquid, repeatedly, in order to improve the permeation of liquid and gas into the cloth. Therefore, according to the present invention, there is provided cloth, or textile, processing apparatus which is relatively small and, as a result, inexpensive.

According to another feature of the invention, there is provided means to stop the descent of the cloth receiving shelves; said means being provided within the cloth stagnation area, intermittently.

According to the present invention, cloth padded with a Patented Apr. 19, 1966 chemical liquid is introduced into the upper portion of the reaction tower of the enclosed type. The cloth is shaken down or folded, by means of a shaker device, on cloth receiving plates which are provided on an inner Wall of the tower at suitable intervals. The piled cloth is intermittently conveyed downwardly at regular time intervals, or by a constant amount at irregular time intervals. Then the cloth is continuously led out of the tower bottom while the cloth is floating in the boiling water or treatment liquid which is kept in the bottom portion of the reaction tower Thus, when the cloth padded with the treatment liquid is stagnated and conveyed Within the reaction tower without tension or abrasion thereof, it is subjected to heat treatment by steaming and the processing of the cloth is attained with high efficiency. Furthermore, by means of boiling water, or the reaction liquid in the bottom portion of 4the reaction tower, the treatment spots due to the steaming are removed and a uniform processing of the cloth is accomplished.

The present invention relates particularly to an apparatus for stagnation and automatic conveying of cloth as well as to a device for intermittently stopping the movement of oppositely arranged cloth receiving shelves. The aforesaid apparatus and stopping device are used in conjunction with said reaction tower or stagnation and conveying tank.

According to an illustrative embodiment of the invention, a pair of chain wheels arranged for intermittent rotation are provided on both the right and left sides within a stagnation tank. A number of cloth receiving members, or shelves, are pivoted at regular intervals on chain belts which are engaged with the chain wheels. The members, or shelves, are so arranged that each shelf hangs on the outside of a chain belt and is held horizontally with respect thereto. The cloth receiving members, or shelves, associated with the right and left chain belts extend horizontally toward each other. The cloth receiving members, or shelves, are moved through said regular intervals with every rotation of the chain wheels.

Further, according to the invention, pairs of stepped cloth receiving shelves are provided at constant intervals vertically on both sides within the appartus for the stagnation and the automatic conveying of the cloth, as well as in the cloth stagnation tank. Cloth, continuously fed thereinto, is piled and stagnated on these shelves. Then the cloth is dropped successively onto lower cloth receiving shelves at every rotation of these shelves. Thus,-there is accomplished the automatic conveying of cloth by means of cloth 4receiving shelves which are restored to their original positions every cycle. According to the apparatus provided by the invention, cloth piled layers containing a considerable weight of liquid may be safely and thoroughly stagnated and conveyed downwardly.

The various features of novelty which characterize the invention are pointed out with particuarity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated and described preferred embodiments of the invention.

In the drawings:

FIG. 1 is a vertical section of an exemplary embodiment of the apparatus according to the invention for the .stagnation and automatic conveying of cloth; said apparatus having chain conveyor -type cloth receiving shelves:

FIG. 2 is an enlarged cross sectional view taken along the section line 2-2 of FIG. l;

FIG. 3 is a plan view of the intermittent stopping device for rotating shafts of the oppositely arranged cloth receiving shelves used in the apparatus shown in FIG. 1;

FIG. 4 is a side view of the stopping device of FIG. 3;

FIG. isalso a side view of the stopping device of FIG. 3 showing it in a particular state of rotary operation;

FIG. 6 is a drawing of mechanism showing the relation between the rotary guide cam groove and the cam roller in FIG. 5; i i

FIG. 7 and FIG. 8 are plan and side elevations with partial sections, respectively, of the intermittent stop device for rotating the shaft of the cloth receiving shelves, which are applied to the cloth conveying apparatus shown in FIG. 6; and r A FIG. 9 is a schematic drawing of another embodiment of the cloth conveying apparatus, according to the invention.

Example 1 This example pertains to the apparatus for the stagnation and the automatic conveying of cloth according to FIGS; land 2. A pair of upper and lower chain drive Wheels 2 is provided symmetrically :on right and left sides within a stagnation tank 1. These chain drive wheels 2 are so driven that they are stopped a number of times for a little while with every rotation thereof. These chain drive wheels 2 may be hexag'onally-shaped as in FIG. 1. A pair of the chain drive wheels 2 is respectively engaged with a conveying chain :belt 3, on which special chains 4 are provided at intervals of length traveled d'uring one rotation of a chain wheel. Cloth receiving arms 5 arev pivoted, respectively, on the special chains 4. The cloth receiving shelves 6 are mounted, respectively, on the arms 5'. Side walls 7 are provided on outer faces of the chain belt 3. For maintaining the horizontal' alignment of the cloth receiving shelves 6 and the vertical alignment of the side walls 7, the guide rails 8 (for horizontal alignment), and the guide'rails 9 (for the returning sides of the chain belt 3) are provided on both sides of the beams 10. The special chains 4l are provided with rollers 11 having one side flange. The rollers' 11 are held between the grooves of the guide rails Sito hold the cloth receiving shelves 6 horizontally' with respect tothe chain belts 3.

The apparatusV operates as follows A long size cloth a passes through a washing tank (not shown) to enter a chemical liquid tank b, where the cloth is saturated with the chemical fluid (for instance, acidic solution of sodium chlorite, in securing and bleaching) andthe cloth is squeezed by a mangle' c. Then the cloth is carried to the upper part within the stagnation tank 1 where it passes through the guide rollers d andis shaken downwardly by a shaker means 12 which functions to fold and pile up the cloth'on the cloth receiving shelves 6 which project toward each other from both chain b'elts 3. The cl-oth a is subjected to steam as itis carried up tothe guide rollers d. When the cloth is folded and has piled up in these folds a predetermined amount, the chain wheels 2 make one rotation and are stopped for a little while by a suitable means. Then the conveying chain belts 3 engaged with the chain wheels 2 are rotatedand theV inner belt portions thereof are moved downwardly a certain distance together with the cloth receiving shelves 60 6, on which the folded and piled cloth is' supported, to a second position (see FIG. l). Also, the uppermost cloth receiving shelves V6 are moved downwardly together with the chain belts 3 to the first position. Thus, the cloth yis repeatedly shaken down and piled up onthe shelves. When the cloth has been piled up by a predetermined amount, the chain wheels 2 are rotated and the cloth receiving shelves `6A are moved down a predetermined distance and are stopped at lthe second position. In lthe same manner as hereinbefore mentioned, the cloth receivingv 4 13 which i's filled with a chemical liquid or water and may be heated b y blowing steam thereinto. Then it is sent to the nextunit operaiton; for example, to the washing tank, or the like, through the guide rollers 14 which are provided at the bottom of the tank.`

In theexarnple justK described, the cloth is piled and stagnated within a space enclosed by the cloth receiving shelves 6 and side walls9and Adescends, through the tank withthern so that no tension Willbe imposed on the cloth. Thus, there is no possibility of the cloth rubbing against vt'hetside walls or the cloth receiving shelves, whereby abrasion damage to the cloth is avoided. .In the stagnation tank, the cloth is allowed 'to stagna-te on each of the receiving shelves. These shelves are, as shown in FIG. l, arrangedA inmany steps so that the pressure due to dead weight of the cll'othis made as small as possible at each step, thus avoiding extensive bendingof the cloth, thereby preventing injury ofits quality. yAlso, the stepwise arrangement of the shelves aids in preventing tension from being impartedy to the cloth `as it is being processed.

.The cloth is stagnated on the receiving shelves for a predeterminedv time period and shifted successively to repeat the, stagnation operation several times, while chemical liquid gas and the likesunciently permeates into the textile. Thus, the treatment is elfective to enable the attainment of a relatively large amount of cloth of uniform quality throughout. v

B y yusing large sized cloth receiving shelves, a large amount of cloth maybe piled up. Therefore, if the cloth is fed into the tank at `high -speedit maybe expeditiously processed by the approximate speed controlling of each partof the mechanism and by increasing the number of positions which Lthe cloth receiving shelves assume during the downwardvdescent.

The stagnation tank may be made ylong in the vertical direction and together with lthe stagnation devices, the volume ofthe tank may Abe made as small as possible so that not so large a space is required vto accommodate the apparatus. Advantageously, the cost thereof may be reduced considerably.

Example 2 vvThis example relates toy an intermittent rotation stopping device, applicable to the apparatus for stagnation and automaticrconveying of cloth having chain conveyer type cloth receiving shelves.V v n In FIG. 37 there is astagnation tank 1,.in which cloth receiving` shelves 6, 6 are mountedon the receiving ar-ms 5, which are fixed with the chain drive wheels 2 and 2', respectively, and are pivotally connected to the conveying chains 3, 3', respectively. As shown, the chain wheel shafts 12 and 12' extend outwardly from a gear box 13.

lOn the rotatable shafts 12 and 12', the gears 14 and 14', which4 have equal diameters, lare lixedly mounted. Between the intermediate idler gears 15 and 14, there is arranged a driving gear 16 which has twice the number of teeth than eitherof the gears 14 or 14. The driving gear 16 is connected with `a rotary arm 18 within a gear box 17. i

`As shown in FIGS. 4 and 5, the'arm 13k is provided with a long groove 25-25, to which aksquare shaped small bearing'19 is tted so as to be able to slide freely along the axis of arm 18. A cam .roller shaft 20 is iitted to this small bearing 19, with which a small metal piece 23 is also combined. The metal piece 23 is engaged with an end of a piston rod 22 of a pressurized air, or pressurizedoil cylinder 21. Also, on another end of the shaft 20, a cam roller 24 is fitted. This cam roller 24 is assembled so as to enter into the cam groove 25-25.

On the cloth receiving shelves 6 and 6', there is a piled layer of cloth, as shown inUFIGS. l and 2, containing moisture. g. The cloth receiving shelves 6, 6' are positioned in several stages or steps resulting in a considerable total Weight which imparts a large force downwardly at all times. Due to this force, the shafts 12 and 12' are always constrained to rotate inwardly in the direction of arrows, as indicated in FIGS. 4 and 5,

Gea-rs 14 and 14', which are iixed to the chain Wheels 12 and 12', are in meshing engagement with the idler gear 15 .and with the lar-ger driving gear 16 and are, as a result, rotated in the direction of arrows, respectively.

To cause these gears to either stop or rotate in one turn, camroller 24 and ca-m groove 25,-25 are utilized.

In FIG; 6, there is shown in dotted lines and arrows the motion of ,cam roller, 24 as it moves along the cam grooves -25'. l

` 4In FIG." 6, the cam roller 24 is illustrated as abutting against camroller stopping positions in the extremities of the cam groove 25-25 whereat no further circular motion of the cam roller 24 can occur; i.e., rotative movement is stopped.

In the condition shown in FIG. 6, the cam roller 24 and the arm 18 are both stopped. Also, the shaft 26 and the largegear 16 connected therewith will be stopped and thesother gears will not be yable to move. Thus, when `the cloth receiving .shelves try to move downwardly due It-o the weight of cloth and try to rotate the chain wheels 2, 2' and their shafts 12, 12', such attempted motions are lcompletely prevented because of the aforesaid stopping positions of the cam groove 25-25' which are formed as cam roller Stoppers. y 4

Now, when it lis desired to start rotational'rnovement, high pressure air or oil is supplied through a pipe 21' to anair or oil cylinder 21, wherein a piston is drawn to the rear part of the lcylinder, so that the piston rod 22 and the metal piece 23 are moved to the left, according to the orientation shown in FIGS. 4 ancll 5. As a result,- .the squaresmall bearing 19 fitted in the long groove of the .arm 18 will be moved along the axis of arm shaft 26.` As shown in FIG. 6, when the cam roller 24 arrives at that portion where the groove 25 is circular, the arm shaft 26 will start to rotate about its own axis owing to the weight of cloth, whereby the roller 24 will rise upwardly and move around along the cam groove until it comes to the stopping position at the opposite side of thecam groove and abuts against the rectangular stopping portion thereby stopping further movement.

When the arm shaft 26 makes a half revolution, the ch-ain wheel shafts 12, 12 make one complete Irevolution because the larger -gear 16 fixed on the other end of the arm shaft 26 has a 'diameter dimension twice that of the gears 14, 14.

When high pressure air, or oil, is supplied from a pipe 21 -on the rear portion of the cylinder 21, the piston rod 22 is pushed outwardly from the cylinder 21 and moves horizontally, thereby moving in a semicircular locus along the lower cam groove 25', whereby the cam roller 24 is returned to its original stop position. By this movement there is made one revolution of the chain wheel shafts 12, 12' which are also stopped at this stopping position.

A direct collision or impact of the cam roller 24 with the stopping portion of the cam groove 25 may cause some troubles. For preventing such troubles, the chain wheel shaft 12 is elongated and extends, as shown in FIG. 3, into the inner portion of the driving gear box 17. A brake wheel 27 is fixed thereto. A brake band 28 is wound around the .periphery of the brake wheel 27. One end of the brake band 28 is connected to an end of an upperlink arm or lever 29', and the lower end thereof is fixed by suitable pin means on a screw rod 29, which acts with a spring 35 to connect with another lower link arm 29". In FIG. 3, only the upper link arm or lever 29 is visible. However, the lower link arm or lever 29" is shown in FIGS. 4 and 5.

Link arms or levers 29', 29 project at right angles from a common metal boss which is fixed on a brake shaft 31, together with a brake ar-m 30. B-oth link arms 29' and 29 can move semicircularly. A brake cam 32 6 is fitted on the outsideof the brake wheel 27 at the end of the rotary shaft 12'. Also, a brake cam roller 33 is combined with the brake arm 30 and is pulledup by a tension spring 34 so as to contact with the periphery of the cam 32 constantly.

As shown in FIG. 4, when `the rotary shaft 12 is stopped, the cam roller 33 is pulled up in abutment with the notched portion of the cam 32 by means of the spring.34, while frictional contact of the brake -band 28 with the brake drum or wheel 27 is relaxed. When the shaft 12' is rotated by the driving means and is accelerated by the weight of piled layer of cloth, then, as shown in FIG. 5, the brake cam roller 33 will mount the uppermost peripheral surface of the brake cam 32 and the brake band 28 will be automatically tightened by the brake lever link -arms 29', 29" to effect uniform rotation of the shaft 12. FIG. 5 shows the condition obtained when `the driving roller-carrying arm 18 is rotated through a 45 angle, wherein the shaft 12', carrying the -brake cam 32, is rotated through about twice such an angle Over-tightening of the brake band 28 may be compensated for by adjusting the restraining force of the spring 35, whereby the brake drum 27 will slowly continue its rotary mot-ion due to the action of air or oil pressure cylinder. Eventually, the cam roller 33 will enter into the notched portion of the brake cam 32 and, as a result, the brake drum 27 is released for free rot-ation; the action of the brake being discontinued and shocks to the mechanism being prevented.

It is for the purpose of ensuring smooth rotary motion by eliminating the imposition of retarding forces at next starting that the brake band 28 is relaxed when. the brake mechanism is stopped.

y In this way Vit is possible to make on rotation and a stop. In addition, by making use of a suitable timer or lthe like, electr-ic current can be supplied to electromagnetic valve means to 4control the flow of air or oil pressure at propertimes to assure an intermittent automatic feeding of the cloth through the apparatus.

In 4the above-described example, the oppositely arranged rotary shafts 12, 12' are caused to make intermittent rotations. They are stopped during everyone rotation. However, the invention -is by no means limited to an -intermittent rotational movement during every one rot-ation. For example, the shafts 12, 12' may be made to effect intermittent rotation and `stop during other optional rotation angles such as 2, 11/2, 1/2, 1A rotations, etc. Namely, the rotation angles of intermittent rotation Iand stoppage of the rotating shafts '12, 12 may be suitably determined in connection with the intermittent rotating distance of the chain conveyer mhich rotates in engagement with said shafts, the piling speed of the cloth and the fitting intervals of cloth receiving shelves,

etc.

Example 3 This example relates to a rotation stopping device shown in FIGS. 7 and 8. This device is applied to an apparatus for the stagnation and the automatic conveying of cloth, as shown in FIG. 9, which employs cloth receiving shelves of a type which will return to their original positions during each rotation. In FIG. 9, more than one pair of rotary shafts F, F' are oppositely arranged along the s-ides of the stagnation tank 1 in a vertical direction at suitable intervals, On the rotary shafts F, F' the cloth receiving shelves G, G are fixed and they project toward each other. Many such pairs of shelves G, G' may be arranged stepwisely within the tank, and by the intermittently acting .stopping mechanism which stops the rotary shafts F, F during every one rotation, the cloth layer piled up on the upper cloth receiving shelves -is successively and intermittently conveyed onto lower situated cloth receiving shelves.

The driving means (shown in FIGS. 7 and 8) for this deviceiis approximately the same as that of Example 2.

The cloth receiving shelves 6, 6 (FIG. 7) are respectively rotated by one rotationofthe rotary shafts 12, 12 in the direction ofyarrows, shown and these shelves are returned to their voriginal positions; the piled cloth being furtherdropped as it is piled up onlthe lower shelves.

In this example, the driving means required are as many as ,the number of steps of the cloth receiving shelves, while fewer parts are required for. the braking devices.

In such case, the cloth receiving shelves, which drop the piled layers of cloth onto lower.- steps during rotation of the shelves, will return to their original positions. As a result, fewer shocks have to be absorbed because the largedriving gear 16 is divided into a peripheral gear portion and an inner wheel portion which isiixed to the shaft and assembledin a flange byrneans of both side faces, within, which shock absorbing springs (6-16 pieces). are enclosed to reduce shocks.

In such case, on rotation and .stop mechanism is employed for returning the cloth receiving shelves to the horizontal position to receivethe cloth with everyone rotation of the rotary shaft. However, if iti-s so arranged that the cloth receiving shelves are `respectively projected on the right and left of each lof the rotary shafts F, F', another rotation andstop vmechanism with every half rotation may be used, `so that the invention is by no means limited to onerotation and half rotation, but can be ,used with driving apparatus for intermittent motion which is stopped after predetermined rotations. y

While specific embodiments of the invention have been shown and described in detail to illustrate the application of the inventive principles, it will, be understood that the invention may be embodied otherwise withou-t departing from such principles.

What is claimed is: A Y

1. An intermittent rotation stop device in an apparatus for stagnation and automatic conveying of cloth, wherein a piled cloth is supported on cloth receiving shelves oppositely projecting Afrom both sides of a 'stagnation tank for processing of cloth, which device includes two opposite shafts for ,rotating said cloth receiving shelves which are mechanically connectedwith driving gears so as to be rotated synchronously, a control shaft driven by said driving gears, a member having. a long cam groove adjacent said control shaft,v a cam roller confined in said groove -and carried by `said control shaft, said cam groove being formed by two semicircular grooves of subst-an-` tially equal size offset radially at opposite diametrical ends to form two stop abutments, and a mechanism operated by uid pressure connected *tor said lcam roller to displace-.Said rollerjolf said abutments to permit intermittent rota-tions of the shafts of sai-d cloth receiving shelves, accompanied with the movement of said cam roller along the semicircula'r grooves to lthe next stop abutment. i

2. A rotation stop device for an apparatus including first and second conveyors each including a rotatable shaft subjectto rotation in opposite respective direc-tions under the influence of the weight of articles carried by the conveyor, comprising a rotatable cam control shaft, gear means for connecting said cam control shaft to the conveyor shafts, a `stationary annular cam, a cam follower connectedto said cam control Ishaft for rotation therewith and positioned to ride on said annular cam,` means mounting said cam follower on said cam control shaft for lrot-ation therewith and also permitting independent displacement of` said follower7 saidv cam lhaving at least one abutment thereon defining a stop preventing rotation of said cam control shaft, and Ymeans connected-to said cam follower for shifting said follower out of valignment with said abutment to permitA the rotation of said cam control shaft and hence the conveyor shafts.

3. A rotation sto-p device according to claim 2, wherein said gear means includes a relatively large diameter gear connected to said c am control Ashaft for rotation therewith, and relatively small diameter gears connected to each of said conveyor shafts. f

4; A rotation stop device according to claim 2, wherein said stationary cam comprises -a member. having an annular groove with abutments formed at diametrically opposite locati-ons thereon.

5. A rotation stop device according to claim 2, wherein said means connected to said cam follower for shifting said cam follower includes a fluid actuated piston.

References Cited by the Examiner UNITED STATESL-PATENTS Y l 1,107,160 8/1914 Macadam 68-177 X 1,220,268 v3/1917l Payet ,.e.. 68-177 X 1,246,993 1l/1917 Payet 68-,-.1' 7 7 X 1,655,090 1/1928 Cunningham 221-295 M. HENSON WOOD, JR., Primary Examiner.

ALLEN N. KNOWLES, Assistant Examiner. 

1. AN INTERMITTENT ROTATION STOP DEVICE IN AN APPARATUS FOR STAGNATION AND AUTOMATIC CONVEYING OF CLOTH, WHEREIN A PILED CLOTH IS SUPPORTED ON CLOTH RECEIVING SHELVES OPPOSITELY PROJECTING FROM BOTH SIDES OF A STAGNATION TANK FOR PROCESSING OF CLOTH, WHICH DEVICE INCLUDES TWO OPPOSITE SHAFTS FOR ROTATING SAID CLOTH RECEIVING SHELVES WHICH ARE MECHANICALLY CONNECTED WITH DRIVING GEARS SO AS TO BE ROTATED SYNCHRONOUSLY, A CONTROL SHAFT DRIVEN BY SAID DRIVING GEARS, A MEMBER HAVING A LONG CAM GROOVE ADJACENT SAID CONTROL SHAFT, A CAM ROLLER CONFINED IN SAID GROOVE AND CARRIED BY SAID CONTROL SHAFT, SAID CAM GROOVE BEING FORMED BY TWO SEMICIRCULAR GROOVES OF SUBSTANTIALLY EQUAL SIZE OFFSET RADIALLY AT OPPOSITE DIAMETRICAL ENDS TO FORM TWO STOP ABUTMENTS, AND A MECHANISM OPERATED BY FLUID PRESSURE CONNECTED TO SAID CAM ROLLER TO DISPLACE SAID ROLLER OFF SAID ABUTMENTS TO PERMIT INTERMITTENT ROTATIONS OF THE SHAFTS OF SAID CLOTH RECEIVING SHELVES, ACCOMPANIED WITH THE MOVEMENT OF SAID CAM ROLLER ALONG THE SEMICIRCULAR GROOVES TO THE NEXT STOP ABUTMENT. 